BookmarkClient can add extra nodes to BookmarkModel.

components/bookmarks/browser/bookmark_node.h

 // Copyright 2014 The Chromium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 #ifndef COMPONENTS_BOOKMARKS_BROWSER_BOOKMARK_NODE_H_
 #define COMPONENTS_BOOKMARKS_BROWSER_BOOKMARK_NODE_H_
 
 #include "base/memory/scoped_ptr.h"
 #include "base/task/cancelable_task_tracker.h"
 #include "base/time/time.h"
 #include "components/favicon_base/favicon_types.h"
 #include "ui/base/models/tree_node_model.h"
 #include "ui/gfx/image/image.h"
 #include "url/gurl.h"
 
 class BookmarkModel;
 
 // BookmarkNode ---------------------------------------------------------------
 
 // BookmarkNode contains information about a starred entry: title, URL, favicon,
 // id and type. BookmarkNodes are returned from BookmarkModel.
 class BookmarkNode : public ui::TreeNode<BookmarkNode> {
  public:
   enum Type {
     URL,
     FOLDER,
     BOOKMARK_BAR,
     OTHER_NODE,
-    MOBILE
+    MOBILE,
+    MANAGED,
   };
 
   enum FaviconState {
     INVALID_FAVICON,
     LOADING_FAVICON,
     LOADED_FAVICON,
   };
 
   typedef std::map<std::string, std::string> MetaInfoMap;
 
@@ skipping 163 matching lines @@
   // BookmarkNode overrides:
   virtual bool IsVisible() const OVERRIDE;
 
  private:
   bool visible_;
 
   DISALLOW_COPY_AND_ASSIGN(BookmarkPermanentNode);
 };
 
 #endif  // COMPONENTS_BOOKMARKS_BROWSER_BOOKMARK_NODE_H_